英文:
json.NewDecoder(r.Body).Decode(&admin) returns empty struct
问题
我知道有很多人遇到了同样的问题，但我仍然在这里。我非常确定我的代码是正确的，但结果的结构体为空。
函数：
func PostAdminHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-type", "application/json")
var admin admin.Admin
json.NewDecoder(r.Body).Decode(&admin)
fmt.Println(admin)
_, err := PostAdmin(admin)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
控制台输出：
{ ObjectID("000000000000000000000000")}
结构体：
package entity
import "go.mongodb.org/mongo-driver/bson/primitive"
type Admin struct {
FirstName string
LastName string
Email string
Password string
Role string
Campus primitive.ObjectID
}
路由：
adminRoute.HandleFunc("/admin", admin.PostAdminHandler).Methods("POST")
我通过Insomnia发送的JSON数据：
{
"FirstName": "Jeanne",
"LastName": "Darc",
"Email": "jeanne.darc@rouen.fr",
"Password": "JeanneDarc2022",
"Role": "admin",
"Campus": "60d5a25ff4d722d3b77d1929"
}
解码器报错信息：
invalid character '}' looking for beginning of object key string
英文:
I know there are a lots of people that has run into the same issue but still here I am. I'm pretty sure my code is correct and still the resulting struct is empty.
Function :
func PostAdminHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-type", "application/json")
var admin admin.Admin
json.NewDecoder(r.Body).Decode(&admin)
fmt.Println(admin)
_, err := PostAdmin(admin)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
Console print :
{ ObjectID("000000000000000000000000")}
Structure :
package entity
import "go.mongodb.org/mongo-driver/bson/primitive"
type Admin struct {
FirstName string
LastName string
Email string
Password string
Role string
Campus primitive.ObjectID
}
Route :
adminRoute.HandleFunc("/admin", admin.PostAdminHandler).Methods("POST")
Json data I'm sending through Insomnia :
{
"FirstName": "Jeanne",
"LastName": "Darc",
"Email": "jeanne.darc@rouen.fr",
"Password": "JeanneDarc2022",
"Role": "admin",
"Campus": "60d5a25ff4d722d3b77d1929",
}
Error i'm getting from decoder :
invalid character '}' looking for beginning of object key string
答案1
得分: 4
这个RFC：
https://datatracker.ietf.org/doc/html/rfc7159
将JSON对象的格式定义为：
> 对象结构由一对花括号括起来，其中包含零个或多个名称/值对（或成员）。名称是一个字符串。每个名称后面跟着一个冒号，将名称与值分隔开来。一个逗号将一个值与后面的名称分隔开来。对象中的名称应该是唯一的。
object = begin-object [ member *( value-separator member ) ]
end-object
member = string name-separator value
所以，不允许有尾随逗号。
请删除输入中的最后一个逗号。
英文:
This RFC:
https://datatracker.ietf.org/doc/html/rfc7159
specifies the JSON object format as:
> An object structure is represented as a pair of curly brackets
> surrounding zero or more name/value pairs (or members). A name is a
> string. A single colon comes after each name, separating the name
> from the value. A single comma separates a value from a following
> name. The names within an object SHOULD be unique.
object = begin-object [ member *( value-separator member ) ]
end-object
member = string name-separator value
So, no trailing commas.
Remove the last comma in the input.
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